import Vue from 'vue'
import VueRouter from 'vue-router'
import Login from '@/components/Login.vue'
import Home from '@/components/Home.vue'
import Welcome from '@/components/Welcom.vue'
import Users from '@/components/user/Users.vue'

Vue.use(VueRouter)

const routes = [
  {path:'/',redirect:'/login'},
  {path:'/login',component:Login},
  {path:'/home',component:Home, redirect:'/welcome', children:[
  {path:'/welcome',component:Welcome},
  {path:'/users',component:Users}
  ]}
 
]

const router = new VueRouter({
  routes
})

//挂载路由导航守卫
router.beforeEach((to,from,next)=>{
  //to将要访问的路径
  //from代表从哪个路径跳转而来
  //next是一个函数，表示放行
  //next（）放行 next（‘/login’） 强制跳装


  if (to.path === '/login')return next();
  //获取token
  const tokenStr = window.sessionStorage.getItem('token')
  if(!tokenStr) return next('/login')
  next()
})

export default router
